JP5115684B2 - Apparatus for removing solid components mechanically using centrifugal separation method and centrifugal separation method for removing solid components mechanically - Google Patents

Description

The present invention is a process of cleaning a dirty part in the state of use and a method of spraying grinding powder generated during processing of a part with a spray nozzle, and a solid suspended in a cleaning liquid that causes clogging of the nozzle The present invention relates to an apparatus for removing a component and mechanically removing a solid component, which is used to repeatedly use a cleaning liquid.

  The cleaning liquid used for cleaning in the cleaning operation contains various contaminants by the cleaning, but is generally used repeatedly until the cleaning effect is reduced. However, in an apparatus for cleaning by a method of spraying using a nozzle, solid components dispersed and suspended in the cleaning liquid cause clogging of the nozzle, and before the chemical function of the cleaning liquid or the physicochemical functions such as dispersibility are deteriorated. Cannot be used repeatedly.

Therefore, in the past, the cleaning liquid was repeatedly used by adding a function to filter out solid components with a filter paper filter, etc., but depending on the condition of the dirt of the parts to be cleaned, there are many solid components, and the filter is heavily consumed. It costs a lot of money. In particular, a soiled substance having a particle size of 1 μm or less not only impairs the function of the cleaning device due to clogging of the nozzle but also decreases the ability to disperse the cleaning liquid. The replacement frequency increased due to clogging.
JP2002-45729

The problem to be solved is a mechanically solid component using a centrifugal separation method that increases the cleaning ability and allows repeated use of the cleaning liquid even when the parts to be cleaned are heavily soiled by fine dirt substances. centrifugation methods suitable means for removing means and mechanically solid component removing are intended to provide.

According to the apparatus for removing a solid component mechanically using the centrifugal separation method according to claim 1 of the present invention, the cleaning waste liquid that is suspended toward the bottom of the tank body and has a nozzle on the lower end portion. A bottomed circular inner cylinder that surrounds the introduction pipe and the cleaning waste liquid introduction pipe at a distance and is provided with a plurality of pores on the outer periphery of the bottom, and is surrounded and surrounded by a distance from the bottomed circular inner cylinder. It consists mainly of a bottomed circular outer cylinder that expands in a divergent shape and has a plurality of pores in the outer peripheral portion closest to the bottom surface, and a separation tank that surrounds the tangible circular outer cylinder at a distance, The separation tank, the bottomed circular inner cylinder, and the bottomed circular outer cylinder provided with annular weirs that cover the entire circumference formed in a plurality of stages on the peripheral wall are rotated at high speed by a driving device via bearing means. It is a thing.

  The apparatus for mechanically removing solid components using the centrifugal separation method according to claim 2 of the present invention is the apparatus according to claim 1, wherein the inner wall of the separation tank is formed on each of the members formed with an annular weir It is intended to be configured through tightening means with a sealing material interposed therebetween.

  The solid-liquid separation device using the centrifugal separation method according to claim 3 of the present invention is the device according to claim 1, wherein an outlet for leading the regenerated liquid is formed on the bottom surface of the tank body. .

A solid-liquid separation device using the centrifugal separation method according to claim 4 of the present invention is the device according to claim 1, wherein a waste liquid outlet provided at the center of the bearing means is formed on the bottom surface of the separator. It will be.

According to the centrifugal separation method for mechanically removing solid components according to claim 5 of the present invention, the cleaning waste liquid is discharged outwardly from the nozzle at the lower end of the cleaning waste liquid introduction pipe suspended inside the separation tank. A plurality of cleaning waste liquids formed on the outer periphery of the upper part of the bottomed circular inner cylinder are formed by surrounding the cleaning waste liquid introduction pipe by being jetted and pressed against the bottomed circular inner cylinder rotating at high speed by centrifugal force. It is discharged outwardly from the pores of the bottom and attached to the bottomed circular outer cylinder, and downwards along the surface that expands downward toward the bottom of the bottomed circular outer cylinder that is also rotating at high speed. It is made to progress and is discharged to the outside from the plurality of pores of the bottomed circular outer cylinder. The solid components contained are settled and fixed in layers on the inner wall of the separation tank. In the meantime, the regenerated liquid from which the solid components have been separated is ejected from the uppermost weir into the tank body, recovered from the outlet provided at the bottom of the tank body, reused as a cleaning liquid, and settled and fixed on the inner wall of the separation tank When the amount of the component reaches a certain level, the high-speed rotation is suddenly stopped or reversed by the driving means, so that the washing waste liquid remaining in the separation tank is separated from the solid component. A much larger flow velocity is generated as a flow in the rotational direction of the inner surface of the separation tank, and the solid components fixed on the wall surface are re-diffused to be extracted from the bottom of the separation tank as waste liquid.

According to the centrifugal separation method for removing a solid component mechanically and the centrifugal separator for removing a solid component mechanically according to the present invention, cleaning of a solid component adhering to a particularly heavily contaminated part, It has become possible to remove the cleaning material such as grinding powder generated during processing extremely effectively using centrifugal force.

FIG. 1 is an elevation view showing the overall configuration of an apparatus for mechanically removing solid components using a centrifugal separation method for carrying out the present invention, and FIG. 2 is an enlarged longitudinal sectional view of the main part thereof. FIG. 4 is an explanatory view showing a process of regenerating a cleaning solution by the method of the present invention.

First, in FIGS. 1 and 2, reference numeral 1 denotes a pedestal that supports the entire apparatus, on which a tank body 2 is mounted. The tank body 2 having the lid 3 accommodates a cleaning waste liquid introduction pipe 4, a bottomed circular inner cylinder 5, a bottomed circular outer cylinder 6, and a separation tank 7. The washing waste liquid introduction pipe 4 is provided at the center of rotation of the bottomed circular inner cylinder 5, the bottomed circular outer cylinder 6 and the separation tank 7, which are high-speed rotating portions of the apparatus of the present invention.

The cleaning waste liquid introduction pipe 4 for supplying the cleaning waste liquid is deeply suspended in the separation tank 7 from the lid body 3 of the tank body 2 through the lid body 8 of the separation tank 7 in the center of the apparatus. A nozzle 9 that opens outward is provided at the lower end portion of the cleaning waste liquid introduction pipe 4.

A bottomed circular inner cylinder 5 kept at a distance from the cleaning waste liquid introduction pipe 4 and a bottomed circular outer cylinder 6 kept at a distance from the bottomed circular inner cylinder 5 are lids of the separation tank 7. At this time, the bottomed circular inner cylinder 5 has a straight cylindrical shape, whereas the bottomed circular outer cylinder 6 has a cross-sectional shape that expands downward in a descending shape. Have. The bottomed circular inner cylinder 5 and the bottomed circular outer cylinder 6 are connected to each other by a connecting member 10 on the bottom surface.

On the outer periphery of the bottomed circular inner cylinder 5 are provided with pores 11 at a plurality of locations on the peripheral surface, and on the outer peripheral surface closest to the bottom surface of the bottomed circular outer tube 6 are provided with pores 12 at a plurality of locations. To do.

The inner wall 13 of the separation tank 7 includes a plurality of members 15 each having an annular weir 14 protruding therefrom . The cross section of the member 15 is L-shaped, the portion corresponding to the vertical line of the L-shaped cross section constitutes the cylindrical wall surface of the separation tank 7, and the portion corresponding to the horizontal fiber of the L-shaped cross section is the cross section constituting the annular weir 14. is there. The height (width) of these annular weirs 14 is configured so that the uppermost one a is almost twice as large as the lower one b. c can be equal to or somewhat higher than a, but it should be kept high enough not to touch the bottomed portion of the bottomed circular outer cylinder. The member at the lowest end of the members constituting the cylindrical wall of the separation tank 7 is integrated with the cylindrical wall portion and the bottom wall 25. Each of the parts constituting the cylindrical wall of the separation tank 7 of the member 15 is formed with a recess 16 on the upper surface, and a sealing material (packing) 17 partially accommodated in the recess 16 is inserted into the separation tank 7. Each member 15 is fastened by fastening means 19 provided on the outer wall 18. That is, the double nut 21 is formed by a locking portion 23 having a double nut 21 and having a double nut 21 formed on the outer wall 18 and a hook 22 projecting from the outer wall 18. Due to the fastening action, the inner wall 13 of the separation tank 7 is kept smooth, and leakage of the cleaning waste liquid and solid components contained in the cleaning waste liquid to the outside is prevented.

The bottom wall 25 of the separation tank 7 is provided with a hollow rotary shaft 28 that is supported by bearing means 27 on the upper surface portion 26 of the gantry 1, and the center where the cleaning waste liquid introduction pipe 4 is formed. The hollow rotary spindle 28 on the extension of the axis forms a waste liquid outlet 29 communicating with the separation tank 7, and is accommodated inside the mount 1 from the hollow rotary spindle 28 via the waste liquid outlet 29. The waste liquid is caused to flow down into the waste liquid tank 30.

A drive device (for example, a servo motor) 31 is attached to the gantry 1, and a pulley 32 attached to a drive shaft of the drive device 31, a belt 33, and a pulley attached to the hollow rotary support shaft 28. The high speed rotation of the driving device 31 is transmitted to the separation tank 7, the bottomed circular outer cylinder 6 and the bottomed circular inner cylinder 5 by the re-34.

An outlet 35 for leading out the regenerated liquid is formed on the bottom surface of the tank body 1, and the regenerated liquid is sent from the outlet 35 to a desired facility via the pipe 36.

Next, the operation of the centrifuge of the present invention will be described with reference to FIG. The separation tank 7, the bottomed circular outer cylinder 6 and the bottomed circular inner cylinder 5 are rotated at high speed by the drive device 31 through the hollow rotating spindle 28 and introduced into the cleaning waste liquid introduction pipe 4 containing solid components. Then, the waste liquid is ejected outward from a nozzle formed at the lower end of the cleaning waste liquid introduction pipe 4 and adheres to the bottomed circular inner cylinder 5. Since the bottomed circular inner cylinder 5 rotates at a high speed, the cleaning waste liquid moves upward along the surface of the bottomed circular inner cylinder 5 by centrifugal force, and is discharged from the plurality of pores 11 formed on the outer periphery of the upper part. And is attached to the bottomed circular outer cylinder 6, and this time, along the surface of the bottomed circular outer cylinder 6, which is formed in a divergent shape, advances downward by centrifugal force. Are released toward the separation tank 7 from the plurality of pores 12 formed in The flow of the waste liquid during this period is shown by broken lines in FIG. In the vicinity of the inner wall of the separation tank 7, the liquid is pressed toward the inner wall by centrifugal force to form a water surface substantially parallel to the inner wall of the separation tank.

On the wall surface of the separation tank 7 rotating at high speed, the waste liquid maintains a momentum having a speed in the rotational direction at a speed substantially equal to the rotation of the separation tank 7 . Therefore, the boundary surface between the waste liquid and the internal space maintains a distance regulated by the annular weir a or c. In this specification, this boundary surface is called a water surface. This water surface is stationary as viewed from the separation tank 7 and forms a flow without disturbance in the vertical direction, so that the solid components in the waste liquid are continuously subjected to centrifugal force in the direction of the wall of the separation tank 7. In particular, even a solid component having a fine particle size can be precipitated.

However, when there is no bottomed circular inner cylinder 5 and bottomed circular outer cylinder 6, the waste liquid sprayed from the cleaning waste liquid introduction pipe 4 does not have a speed in the rotational direction, so it is pressed against the inner wall surface of the separation tank 7. When the waste liquid having the same rotational speed as that of the separation tank 7 is touched, the liquid level is disturbed by a large speed difference, and the flow is disturbed even inside the liquid layer, so that fine particles cannot be settled.

Therefore, the liquid sprayed from the cleaning waste liquid introduction pipe 4 is first sprayed inside the bottomed circular inner cylinder 5 with a small diameter, and at the same time, the speed difference is reduced, and at the same time, it is pushed against the inner surface of the bottomed circular inner cylinder 5 and rises. During this process, the speed reaches the same speed as that of the bottomed circular cylinder 5 and is further injected into the bottomed circular outer cylinder 6 having a large outer shape to increase the speed in the rotational direction. It approaches the speed of the separation tank 7. Since the centrifugal force increases in proportion to the radius of the bottomed circular outer cylinder 6 that spreads toward the end, the degree of speed transmission due to friction with the wall surface is also proportional to the increase in radius. Since the circumference of the expanding wall surface increases, the thickness of the waste liquid adhering to the wall surface becomes thin, and it becomes easy to adapt to the speed of the wall surface in the rotation direction. As a result, there is a speed difference between the waste liquid ejected from the plurality of pores 12 formed near the lower end of the bottomed circular outer cylinder 6 that is widened toward the bottom and the liquid level in the solid-liquid separation process pressed against the wall surface of the separation tank 7. The turbulence that occurs almost disappears and subsides inside the second stage weir, so the flow after the second stage weir is only a vertical flow, and it is possible to settle minute solid components.

Here, the cleaning waste liquid containing the solid component settles and adheres in layers to the inner wall 13 of the separation tank 7 due to the difference in specific gravity while moving over the annular weir 14 one after another in the situation indicated by the arrow. Then, the deposited layer 37 is formed. When the upward flow is analyzed in detail, the speed in the portion in contact with the wall surface is different from the speed in the vicinity of the water surface, and the speed in the portion in contact with the wall surface becomes slow. This is due to friction with the wall. The closer to the wall, the greater the circumference, the wider the flow width and the lower the speed, and the closer to the wall, the greater the centrifugal force and the higher the density, so the flow velocity decreases. This is considered to be a synergistic effect. Therefore, by providing a weir with a height that does not disturb the flow of the water surface in the middle of the flow, the flow in the immediate vicinity of the weir can be directed in the direction opposite to the water surface, and when viewed in a vertical section, it rotates around the weir A flow will occur. The solid component of the fine particles settling in this flow is pushed upward, contrary to the flow near the water surface, and the deposited layer 37 is thicker in the lower part and thinner as it goes upward. In FIG. 3, 38 indicates the supernatant of the cleaning waste liquid that is pressed outward by the rotation of the separation tank 7, and 39 is pressed against the inner wall 13 of the rotating separation layer 7 by applying centrifugal force to the cleaning waste liquid. This shows the water surface when a vertical water surface is formed. In order to repeatedly generate such a flow near the wall surface in the opposite direction to the flow near the water surface, the weir b is desirably lower than the water surface. Furthermore, the distance between b is approximately twice the height of the weir b, so that when the solid component is less settled, the reciprocating flow seen in the vertical cross-section becomes two circles to promote sedimentation. In addition, the settling amount of the solid component increases to some extent, and the reciprocating flow becomes one of the portions close to the weir, and the deposited layer is biased downward.

The regenerated liquid from which the solid component has been separated crosses over the topmost weir a and jumps to the wall surface of the tank body 2, flows down the wall surface to reach the bottom, and flows out from the bottom outlet 35 through the pipe 36. When the work reaches a certain stage, the high-speed rotation by the driving device 31 is suddenly stopped or reversed, so that the liquid remaining in the separation tank 7 and the solid components are separated. A much larger flow velocity is generated as a flow in the rotation direction of the inner surface of the separation tank 7, and the solid component formed as the deposition layer 37 on the inner wall 13 of the separation tank 7 is re-diffused to communicate with the bottom of the separation tank 7 as waste liquid. The waste liquid is discharged from the waste liquid outlet 29 to the waste liquid tank 30. The timing at which the waste liquid is discharged and discharged varies depending on the quality and concentration of the solid component in the cleaning waste liquid, and therefore it may be set at an acceptable interval by evaluating the quality of the regenerated cleaning liquid at the outlet 35 obtained by separating the solid.

The height of the weir a needs to be selected appropriately depending on the inner diameter and rotation speed of the separation tank 7, but when the separation tank is 300 mm, it is preferably 10 mm or more and 30 mm or less. An example of the processing speed when the height of the weir a is 20 mm is shown below.
In the case where the separation flow rate in the separation tank 7 is 5 liters per minute, the vertical flow speed can be calculated from the amount of water passing through the horizontal section of the liquid held in the separation tank 7. That is, if the distance from the wall surface to the surface of the water is 20 mm, the cross-sectional area for the separation tank 7 with a diameter of 280 mm is
(280/2) ² × π― (240/2) ²
× π = 61544−45216 = 16328 square mm.
That is, 163.3 square cm.

Since 5 liters (5000 cc) pass through this cross section per minute, when the flow rate is expressed in seconds, the liquid passage rate of 5000 ÷ 60 = 83.3 cc / sec per second,
83.3 ÷ 163.3 ＝ 0.511cm / sec
It becomes.
(For reference, the flow velocity over the weir 14 is about half the cross-sectional area and lcm / sec, but the distance between the weir 14 and the weir 14 is four times the distance from the top of the weir to the water surface. (Because of the above, the speed of the intermediate portion of the weir 14 that sinks is not significantly affected.)

Experiments have demonstrated that at this speed, almost all solid components settle at 100G centrifugal force.

Next, since the rotation speed when the centrifugal force becomes 10G is about 200 rpm, when the separation tank 7 is stopped suddenly at 200 rpm in the process of stopping the separation tank 7, the liquid is inertial and moves along the separation tank 7. In this case, the flow velocity is the speed of rotating a circle with a diameter of 240 mm 200 per minute, so the circumference is 240 × 3.14 = 753.6 mm ・ ・ ・ 75.4 [cm / rotation]
Rotation speed 200 ÷ 60 = 3.3 rotations / sec

Using

75.4 × 3.3 = 248.9cm / sec
Therefore, for the flow rate of 0.5 cm / sec when separating in the separation tank 7

248.9 ÷ 0.5 ÷ 497

That is, the flow rate is 497 times, and the flow rate is sufficient to disperse the settled solid component in the re-liquid. Furthermore, assuming the case of solidifying over a long period of time, the separation tank 7 is reversed, and the relative speed difference is set to about 1000 times, so that most of the precipitated solid components are It can be dispersed in a liquid and poured out.

As another calculation, the amount of water retained by the weir 14 is the horizontal cross-sectional area of the liquid x the vertical length, so when the depth of the separation tank 7 is 300 mm
163.3 × 30 = 4899cc.

When the time for which the liquid is convected inside the separation tank 7 is 1 minute, 4.9 liters can be flowed.

Also, if the flow rate is reduced, the residence time becomes longer, and even small particles with the same acceleration can be removed.

The sedimentation rate of the fine particles in the liquid for the required residence time is:
1. Accelerated sedimentation by gravity
2. Since the resistance received from the liquid is proportional to the square of the speed, the acceleration gradually slows down, and the resistance force balances with the resistance force as much as possible-approaching a constant speed (end speed).

The value of the resistance proportional to the speed is influenced by the viscosity coefficient of the fluid. Further, the sedimentation time of the substance dispersed in the fluid varies depending on the particle size. Under such complicated conditions, it is not possible to simply calculate the relationship between acceleration and time, so the time required for sedimentation is only experimental, so in the present invention, parts that use grease containing molybdenum disulfide are cleaned. As a result of experimenting with the waste liquid, good results have been obtained.

  The results of the experiment show that when it is left standing under the earth's gravity (lG), that is, when it settles at the terminal velocity, it takes about 3 days (72 hours or more) to settle most solid components in the liquid tested. It was. However, the prototype device was able to remove the solid components completely with a residence time of 10 minutes at 100G. Furthermore, when the acceleration was increased to about 1000G, solid components could be almost recovered with a residence time of 1 minute.

  The solid-liquid separation method of the present invention will be described using a stationary tank in which kerosene used for cleaning parts in an automobile maintenance shop is installed on the floor. In the process of washing parts soiled with soil and oil in an automobile maintenance shop, petroleum-based cleaning agents such as kerosene are often used as cleaning agents. The specific gravity of a cleaning agent such as kerosene is about 0.7 to 0.9, whereas the specific gravity of sand and metal powder is 1.7 to 11, which is larger than that of the cleaning liquid. It is known that when the waste liquid used for the detergent for such parts is stored in a container for several days and left to stand, the solid contaminants sink to the bottom and the transparent supernatant can be recovered and reused. However, although the reproductivity is poor and it is not practically used for the reuse of the cleaning liquid, since the solid-liquid separation by the centrifugal method of the present invention is the same in principle, the present invention is modeled on the method of standing the waste liquid. Explain the technology.

The principle of generating the supernatant liquid by allowing the cleaning waste liquid to settle and generating a supernatant liquid is that the component with a higher specific gravity sinks due to the gravity difference of the cleaning liquid and the solid component in the waste liquid at a gravitational acceleration of 1G. This is due to the principle that a layer is formed. As a theory of a phenomenon in which solid components dispersed in a solution settle, Stokes' calculation formula is used. The Stokes equation is
V = 2/9 × ((ρ−ρw) gr ² ) / η
It is. Where V is the settling velocity (cm / sec), ρ is the particle density (g / cm ³ ), ρw is the solvent density (g / cm ³ ), g is the acceleration of gravity (cm / sec ² ), r Is the particle radius (cm) and η is the solvent density (g / cm.sec).

  In the cleaning waste liquid of an automobile maintenance shop, the distribution of particle size and the specific gravity of the particles vary depending on the running conditions of the vehicle that has been maintained, but when measuring the solid components of general cleaning waste liquid, the distribution is Gaussian. The distribution was approximated, and 95% of the particles had a particle size of 4 microns to 0.2 mm and a specific gravity of 2 to 14. Therefore, if the waste liquid from which the automobile parts are washed is allowed to stand, if solid particles having a particle size of 4 microns and specific gravity of 2 settle, all solid components having a particle size or specific gravity larger than that will settle.

Stokes equations, specific gravity 2, when the particle size 4 microns particles obtain a velocity which settle as a state of being diffused into kerosene viscosity 10- ⁴ P
V = 2/9 × [(1) × 1 × (4 × 10 ⁻³ ) ² ] ÷ 10 ⁻⁴ = 3.4 × 10 ⁻⁴ cm / sec
Thus, the solid component settles at a speed of 0.034 mm / sec, and a supernatant liquid having a thickness of about 2 mm is formed in one minute. To continuously introduce the waste liquid into the stationary tank, settle the solid components, and take out the liquid on the surface layer, prepare a tank with the configuration shown in Fig. 4 and gently introduce the liquid from one end and from the other end. A method of taking out the surface layer liquid is conceivable. The waste liquid is sealed in the liquid introduction pipe 40 and overflows from the first weir 1 to the rectifying weir 41. The liquid overflowing from the weir 1 spreads evenly in the depth direction of the tank almost following the upper surface of the weir 1 due to the surface tension and flows out to the rectifying layer 41, but the unevenness of the liquid injection cannot be completely removed. The rectifying layer 41 is for equalizing the liquid flow. The weir 2 is set lower than the weir 1 and slightly higher than the weir 3 on the overflowing side of the settling tank 42 so that the liquid gently flows into the settling tank 42 from the rectifying layer 41. The liquid flowing into the settling tank 42 generates a turbulent flow in the immediate vicinity of the weir 2, but the flow is adjusted while moving in the direction of the weir 3 and becomes a rectification parallel to the bottom surface.

  In this case, the shallower the liquid is, the shorter the rectification takes place. However, in this tank, it is necessary to allow the solid component to settle on the bottom surface, so a depth for accumulating the solid component is required. This change in flow is schematically represented in FIG. In FIGS. 5 and 6, b is a sedimentation region, and the liquid flow becomes a steady steady flow, and the solid components in the waste liquid move downward together with the supernatant liquid on the upper surface while moving downward. The flow of the entire liquid is faster as the surface layer is closer to the bottom, but the flow changes more slowly. That is, the flow velocity is 0 at the portion in contact with the bottom or the deposited layer. Sedimentation progresses with movement and the thickness of the supernatant liquid increases. As shown in the figure, the liquid overflowing from the weir 3 flows out so as to be sucked not only from the surface layer liquid but also from below. Therefore, the thickness of the supernatant liquid in the vicinity of the weir 3 is calculated as the waste liquid residence time by calculating from the average cross-sectional velocity immediately before the flow changes when flowing out from the weir 3 from the portion where the uniform flow starts. The thickness of the supernatant calculated by this residence time was taken into account the lower portion sucked into the overflow of the supernatant liquid that overflowed, and a margin of twice the cross-sectional area required for the average outflow rate was observed. It is desirable to set the residence time.

When the method described in this model is applied to the wall of a rotating body as shown in Fig. 1, the centrifugal force of the rotating body is
Xg = (r × ω ² ) / 980
Since the acceleration g on the inner surface of the circumference with a radius of 140mm is 1000 RPM and 1408 g at 156 g 3000 rpm, the force that acts on the waste liquid instead of the acceleration g of gravity in the Stokes formula As a result, the value of g can be replaced with 100 to 150. That is, it is possible to exhibit a solid-liquid separation capacity 100 times or more that when the washing waste liquid described in the model is left standing.

  In the case where liquid is continuously injected and taken out by the precipitation device formed on the wall surface of the rotating body, liquid that does not move in the rotational direction is introduced, and intense turbulence occurs in the liquid introduction pipe. In a low-viscosity liquid such as kerosene, it takes time for the newly injected waste liquid to reach the rotational speed, and the violent turbulence reaches the settling tank, and a uniform flow cannot be created. Therefore, in the present invention, the bottomed circular inner cylinder 5 and the bottomed circular outer cylinder 6 are provided inside the rotating separation tank 7, and the introduced liquid is given a movement in the rotational direction substantially equal to the rotation of the tank, so that the separation tank 7 A state close to that when a liquid is introduced into a tank that has been allowed to stand by a method of introducing it under the weir 14 is created. In addition, since the acceleration of centrifugal force is larger than the acceleration of gravity, if large particles or heavy particles overflow the weir and are poured into the sedimentation tank, the waste liquid vigorously moves toward the wall. Moving. As a result, the turbulent flow area of the settling tank is widened, and a sufficient settling speed cannot be secured. Therefore, in the present invention, the number of weirs is increased from twice the explanatory model to four stages, and the four weirs are overflowed sequentially while sinking large particles from the waste liquid injection part and particles with large specific gravity in the direction of the wall 13. The waste liquid leaving particles with a small particle size and specific gravity that tends to be a uniform flow was poured into the sedimentation tank.

1 is an elevation view showing the overall configuration of a solid-liquid separation device using a centrifugal method for carrying out the present invention. FIG. 2 is an enlarged longitudinal sectional view of a main part of FIG. It is explanatory drawing which shows the process of cleaning liquid reproduction | regeneration by this invention. A tank that continuously introduces waste liquid, settles solid components, and removes surface liquid. It is the figure which expressed the change of the flow typically. It is another figure which expresses the change of a flow typically.

4 Cleaning waste liquid introduction pipe
5 Bottomed inner cylinder
6 Bottomed outer cylinder
7 Separation tank
9 nozzles
11 pores (bottom circular inner cylinder 5)
12 pores (bottomed round outer cylinder 6)
13 Inner wall (for separation tank 7)
14 Ring weir
15 parts
25 Bottom wall (for separation tank 7)
26 Hollow rotating spindle
31 Drive unit (Servo motor)
40 Liquid introduction layer
41 Rectifier tank
42 Settling tank
a Turbulence region
b Sedimentation zone (uniform flow zone)
43 Weir 1
44 Weir 2
45 Weir 3
46 Turbulence
47 Turbulence
48 Uniform flow

Claims (5)

A cleaning waste liquid introduction pipe that hangs down toward the bottom of the tank body and has an outer nozzle at the bottom, and surrounds this cleaning waste liquid introduction pipe at a distance and has a plurality of pores on the outer periphery of the top. A bottomed circular inner cylinder and a bottomed circular outer cylinder that surrounds the bottomed circular inner cylinder while maintaining a distance, expands downward toward the bottom, and has a plurality of pores on the outer periphery near the bottom surface And a separation tank that surrounds the bottomed circular outer cylinder at a distance, and is provided with an annular weir formed on a plurality of steps on the inner peripheral wall and covering the entire circumference, and the bottomed circular inner An apparatus for mechanically removing solid-liquid components using a centrifugal separation method, characterized in that a cylinder and the bottomed circular outer cylinder are rotated at high speed by a drive device via a bearing means. Wherein the inner wall of the separation vessel and to be configured via the fastening means in a state of Sashihasan the Fusuki material between the members forming the annular dam, respectively, the mechanical using centrifugal force according to claim 1 A device that removes solid components . 2. The apparatus for removing a solid component mechanically using centrifugal force according to claim 1, wherein an outlet for leading the regenerated liquid is formed on the bottom surface of the tank body. The apparatus for removing a solid component mechanically using centrifugal force according to claim 1, wherein a waste liquid outlet provided at the center of the bearing means is formed on the bottom surface of the separation tank. Inside the bottomed circular shape that surrounds the cleaning waste liquid introduction pipe and rotates at high speed by ejecting the cleaning waste outward from the nozzle at the lower end of the cleaning waste liquid introduction pipe suspended in the separation tank The cleaning waste liquid that is pressed against the cylinder by centrifugal force and spreads uniformly on the inner surface of the bottomed circular inner cylinder is discharged outward from the plurality of pores formed on the outer periphery of the top, and attached to the bottomed circular outer cylinder. The bottomed circular outer cylinder rotating at a high speed is allowed to travel downward along a surface expanding in a divergent shape toward the bottom, and discharged outward from the plurality of pores of the bottomed circular outer cylinder. The bottomed circular outer cylinder rotating at a high speed is allowed to travel downward along the surface expanding in a divergent shape toward the bottom, and outward from the plurality of pores of the bottomed circular outer cylinder. by release, allowed to reach the separation vessel rotating at high speed, it was formed on the inner wall of the separation tank The solid component contained in the washing waste liquid is settled and fixed in layers on the inner wall of the separation tank while moving over the dams one after another, and the regenerative liquid from which the solid components are separated during this period The solid component separated and settled from the bottom of the tank body that is discharged from the weir and collected from the bottom of the tank body-when the high-speed rotation by the driving means stops suddenly or reverses, In the separation tank as a waste liquid, the solid component stuck to the wall surface is re-diffused by causing a flow rate in the rotational direction of the inner surface of the separation tank to generate a flow rate much higher than when separating the solid components in the liquid remaining in A centrifugal separation method for mechanically removing a solid component , characterized in that the solid component is discharged from the bottom of the plate.

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